Free Simple Circuit Diagram
RS flip-flop, or reset-set flip flop, is a kind of stable multivibrator with two input, namely reset and set. The output will be at one of two stable states, set (active) or unset (inactive). A pulse strobe on set input will activate the output, and a strobe on reset input will deactivate the output. This two stable stage are provided […]
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Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate variable capacitance with very wide range, which can be used in digitally controlled analog processor (programmable filters for example). The following circuit shows a DAC0830 connected as a capacitance multiplier. This circuit is a DAC controlled amplifier (used capacitance multiplication) to […]
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To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD decoder to drive 3-digits 7 segment display. Each digit will be activated in sequence, but it will look like that all digits are driven continuously since the sequence is repeated quickly. Here is […]
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A pulse counter can be built by using 7490 decode counter and 7557A. This circuit can count from zero to 9. Pins 3 and 2 of all 7490’s must be connected together. Here is the schematic diagram of the circuit: A push button is used as reset. The input of this circuit is a pulse that is produced by other […]
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